woocommerce invoice template

Hi! I really appreciate if somebody can guide me how to change in woocommerce the invoice template. I know that you have to create folder “emails” to your childtheme and change php code there but I really dont know how to deal with php.
Actually I´m super disappointed that so obvious thing like invoice which shall be pretty stright forward to do, looks originally like piece of shit and its even not called as “invoice” but “order” I have been trying to change it and playing around for hours without result:(

What I need is that the invoice shall be called “INVOICE” and there must be invoice number, something like here.
Sure, reference to order number is also relevant.
Total amount with and without VAT, VAt% are must on the invoice.
Does anyone has php template to share? Appreciate for help!